Versatile attacker Felipe Anderson, meanwhile, has been a target of Manuel Pellegrini's since he took the West Ham job, and the deal finally appears to be gaining traction after previously reaching something of an impasse.

However, club figures have been locked in negotiations with the Serie A club, and have now upped their offer to £40m. Bonuses are expected to top that figure up and the Hammers are hopeful of completing their record signing this summer.

West Ham have also initiated contact with Borussia Dortmund over the possible signing of Andriy Yarmolenko and remain in talks with the German club.

The Ukraine international is valued at €20m (£17m/$23m) by the Bundesliga side, per ClaretandHugh, but it is as yet unclear if the club will try to sign both players, or merely one.

“I hope that, next week, or before we finish July, the fans of West Ham will have good news," he told the club's official website . "We are trying to build a strong squad and to find the players that we need.